:root {
  --navy: #071b2f;
  --navy-2: #0d2d4b;
  --steel: #536a7c;
  --orange: #ff6a1a;
  --orange-2: #ff9d42;
  --cream: #f5f1e8;
  --white: #ffffff;
  --ink: #101922;
  --muted: #62707d;
  --line: #dce3e8;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.55;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.site-header { position: sticky; top: 0; z-index: 30; min-height: 76px; display: flex; align-items: center; gap: 28px; padding: 8px clamp(20px, 5vw, 80px); color: white; background: rgba(7,27,47,.96); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(255,255,255,.1); }
.brand { display: flex; align-items: center; margin-right: auto; }
.brand img { width: 58px; height: 58px; object-fit: contain; background: white; border-radius: 8px; }
.brand span { display: grid; margin-left: 12px; letter-spacing: .08em; line-height: 1; }
.brand strong { font-size: 1.25rem; }
.brand small { margin-top: 7px; font-size: .62rem; color: #b9c8d5; }
nav { display: flex; align-items: center; gap: 26px; font-size: .92rem; }
nav a:hover { color: var(--orange-2); }
.nav-cta { padding: 11px 17px; background: var(--orange); border-radius: 4px; font-weight: 750; }
.language select { color: white; background: transparent; border: 1px solid #7890a5; border-radius: 4px; padding: 8px; }
.language option { color: var(--ink); }
.menu-toggle { display: none; }
.hero { position: relative; min-height: 690px; display: grid; align-items: center; color: white; overflow: hidden; background: var(--navy); }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,17,31,.98) 0%, rgba(3,17,31,.82) 40%, rgba(3,17,31,.14) 72%), var(--hero) center/cover; }
.hero-inner { position: relative; width: min(720px, 88vw); margin-left: clamp(20px, 7vw, 110px); padding: 90px 0; }
.eyebrow { display: inline-flex; gap: 9px; align-items: center; color: var(--orange-2); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 32px; height: 2px; background: currentColor; }
h1 { margin: 20px 0; max-width: 900px; font-size: clamp(2.8rem, 6vw, 5.8rem); line-height: .96; letter-spacing: -.055em; }
.hero p { max-width: 630px; font-size: clamp(1.02rem, 1.8vw, 1.25rem); color: #d5e0e9; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border: 1px solid transparent; border-radius: 4px; background: var(--orange); color: white; font-weight: 800; }
.button.secondary { background: transparent; border-color: #9bb0c1; }
.trust-strip { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--cream); border-bottom: 1px solid #e5dfd4; }
.trust-strip div { padding: 25px clamp(14px, 3vw, 42px); border-right: 1px solid #ddd5c8; }
.trust-strip strong { display: block; color: var(--navy); font-size: 1.15rem; }
.trust-strip span { color: var(--muted); font-size: .82rem; }
.section { padding: clamp(72px, 9vw, 126px) clamp(20px, 6vw, 92px); }
.section.dark { color: white; background: var(--navy); }
.section.cream { background: var(--cream); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 46px; }
.section-head h2, .page-intro h1 { margin: 12px 0 0; font-size: clamp(2.2rem, 4vw, 4.4rem); line-height: 1; letter-spacing: -.045em; }
.section-head p { max-width: 570px; color: var(--muted); }
.dark .section-head p { color: #b9c7d3; }
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.category-card { min-height: 310px; display: flex; flex-direction: column; justify-content: end; padding: 28px; color: white; background: linear-gradient(145deg, #163b5d, #071b2f); border: 1px solid #294a67; border-radius: 8px; transition: transform .2s, border-color .2s; }
.category-card:hover { transform: translateY(-5px); border-color: var(--orange); }
.category-card span { color: var(--orange-2); font-weight: 800; }
.category-card h3 { margin: 10px 0; font-size: 1.45rem; }
.category-card p { color: #bed0df; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.product-card { min-width: 0; border: 1px solid var(--line); border-radius: 7px; background: white; overflow: hidden; transition: transform .2s, box-shadow .2s; }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 20px 45px rgba(7,27,47,.12); }
.product-image { position: relative; aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 16px; background: #fff; }
.product-image img { width: 100%; height: 100%; object-fit: contain; }
.normalized-product { overflow: hidden; }
.normalized-product img { transform: none; transform-origin: center; transition: transform .25s ease; }
.jet-badge { position: absolute; z-index: 2; top: 12px; left: 12px; padding: 6px 9px; border-radius: 999px; color: var(--navy); background: rgba(255,255,255,.92); border: 1px solid rgba(7,27,47,.14); box-shadow: 0 4px 14px rgba(7,27,47,.08); font-size: .65rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.jet-badge.fine { border-color: #85bfe9; }
.jet-badge.standard { border-color: #92c67f; }
.jet-badge.wide { border-color: #f0b765; }
.jet-badge.heavy { border-color: #e89780; }
.product-copy { padding: 20px; }
.product-copy span { color: var(--orange); font-size: .75rem; font-weight: 850; letter-spacing: .1em; }
.product-copy h2 { margin: 8px 0; font-size: 1.12rem; line-height: 1.25; }
.product-copy p { min-height: 44px; color: var(--muted); font-size: .84rem; }
.product-copy strong { color: var(--navy); font-size: .86rem; }
.split { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 620px; }
.split-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(55px, 8vw, 120px); background: var(--navy); color: white; }
.split-copy h2 { margin: 14px 0 20px; font-size: clamp(2.3rem, 4vw, 4.8rem); line-height: 1; letter-spacing: -.05em; }
.split-copy p { color: #c6d3dd; }
.split-media { min-height: 520px; background: var(--jifan-hero) center/cover; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: #36516b; }
.step { padding: 34px; background: var(--navy-2); }
.step span { color: var(--orange-2); font-weight: 900; }
.step h3 { margin: 30px 0 10px; }
.step p { color: #bed0df; font-size: .9rem; }
.page-intro { padding: 92px clamp(20px, 7vw, 110px) 76px; color: white; background: linear-gradient(115deg, var(--navy), #174469); }
.page-intro p { max-width: 760px; color: #cedce7; font-size: 1.1rem; }
.breadcrumbs { color: #9eb5c7; font-size: .85rem; }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 7vw, 100px); align-items: center; }
.detail-image { aspect-ratio: 1; display: grid; place-items: center; padding: 40px; border: 1px solid var(--line); background: #f8fafb; }
.detail-image img { width: 100%; height: 100%; object-fit: contain; }
.detail-copy h1 { font-size: clamp(2.5rem, 5vw, 5.2rem); }
.feature-list { display: grid; gap: 12px; padding: 0; list-style: none; }
.feature-list li { padding: 13px 16px; border-left: 3px solid var(--orange); background: var(--cream); }
.sample-note { padding: 14px 16px; color: #5d4a34; background: #fff7e8; border: 1px solid #eed9b6; font-size: .85rem; }
.category-cn { margin: 8px 0 0; color: var(--orange); font-weight: 750; }
.category-cn.light { color: #ffc18f; }
.class-nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; padding: 0 clamp(20px, 6vw, 92px); background: var(--navy); }
.class-nav-card { min-height: 180px; display: flex; flex-direction: column; justify-content: end; padding: 26px; background: #f4f7f9; border-top: 4px solid var(--orange); }
.class-nav-card span { color: var(--orange); font-size: .72rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.class-nav-card strong { margin: 10px 0 4px; color: var(--navy); font-size: 1.2rem; }
.class-nav-card small { color: var(--muted); }
.class-nav-card.fine { border-top-color: #4a9bd3; }
.class-nav-card.standard { border-top-color: #72ad5c; }
.class-nav-card.wide { border-top-color: #e99a2f; }
.class-nav-card.heavy { border-top-color: #d96649; }
.catalog-groups { padding: 0 clamp(20px, 6vw, 92px) 100px; }
.catalog-group { padding: 100px 0 10px; scroll-margin-top: 92px; }
.catalog-group + .catalog-group { border-top: 1px solid var(--line); }
.group-benefit { max-width: 590px; display: grid; gap: 8px; padding: 22px 24px; background: var(--cream); border-left: 4px solid var(--orange); }
.group-benefit strong { color: var(--navy); }
.group-benefit span { color: var(--muted); font-size: .9rem; }
.category-overview { display: grid; grid-template-columns: 1.35fr .8fr .95fr; gap: 1px; color: white; background: #36516b; }
.category-overview > div { padding: clamp(30px, 5vw, 70px); background: var(--navy); }
.category-overview h2 { margin: 15px 0; max-width: 760px; font-size: clamp(1.8rem, 3vw, 3.2rem); line-height: 1.05; }
.category-overview h3 { margin-top: 0; color: var(--orange-2); }
.category-overview p, .category-overview li { color: #c7d5df; }
.category-overview ul { display: grid; gap: 10px; margin: 0; padding-left: 18px; }
.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 28px 0; background: var(--line); border: 1px solid var(--line); }
.spec-grid div { display: grid; gap: 5px; padding: 16px; background: white; }
.spec-grid span { color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.spec-grid strong { color: var(--navy); font-size: .92rem; }
.quote-form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 900px; }
.quote-form div { display: grid; gap: 7px; }
.quote-form .full, .quote-form button, .form-note { grid-column: 1 / -1; }
.quote-form input, .quote-form textarea { width: 100%; border: 1px solid #b8c5cf; border-radius: 4px; padding: 13px; background: white; }
.quote-form input:focus, .quote-form textarea:focus { outline: 3px solid rgba(255,106,26,.25); border-color: var(--orange); }
.quote-form button { min-height: 54px; border: 0; border-radius: 4px; color: white; background: var(--orange); font-weight: 850; cursor: pointer; }
.form-note { color: var(--muted); font-size: .82rem; }
.prose { max-width: 900px; }
.prose h2 { margin-top: 48px; font-size: 2rem; }
.prose p, .prose li { color: #3e4b56; }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.blog-card { padding: 30px; border: 1px solid var(--line); border-radius: 7px; }
.blog-card span { color: var(--orange); font-size: .78rem; font-weight: 850; text-transform: uppercase; }
.blog-card h2 { font-size: 1.4rem; }
footer { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding: 68px clamp(20px, 6vw, 92px) 30px; color: white; background: #03101e; }
footer div { display: grid; align-content: start; gap: 10px; }
footer p, footer a { color: #9fb2c2; font-size: .9rem; }
.copyright { grid-column: 1 / -1; padding-top: 30px; border-top: 1px solid #183149; }
.catalog-back { color: var(--navy); border-color: #7890a5; }
.quote-success, .quote-error { max-width: 900px; padding: 14px 18px; border-radius: 4px; font-weight: 700; }
.quote-success { color: #1f5d38; background: #e9f7ee; border: 1px solid #a9d8b9; }
.quote-error { color: #8b2d25; background: #fff0ee; border: 1px solid #e6aaa4; }
body.admin-bar .site-header { top: 32px; }
@media (max-width: 782px) { body.admin-bar .site-header { top: 46px; } }
@media (max-width: 980px) {
  .product-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split, .product-detail { grid-template-columns: 1fr; }
  .class-nav { grid-template-columns: repeat(2, 1fr); }
  .category-overview { grid-template-columns: 1fr; }
  .menu-toggle { display: block; color: white; background: transparent; border: 1px solid #7890a5; border-radius: 4px; padding: 8px 12px; }
  nav { position: absolute; top: 76px; left: 0; right: 0; display: none; align-items: stretch; flex-direction: column; padding: 24px; background: var(--navy); }
  nav.open { display: flex; }
  .language { margin-left: 0; }
}
@media (max-width: 640px) {
  .site-header { gap: 10px; padding: 8px 14px; }
  .brand span { display: none; }
  .hero { min-height: 650px; }
  .hero::before { background: linear-gradient(180deg, rgba(3,17,31,.75), rgba(3,17,31,.98)), var(--hero) 67% center/cover; }
  .hero-inner { margin: 0 20px; padding: 70px 0; }
  .trust-strip, .product-grid, .category-grid, .steps, .blog-grid { grid-template-columns: 1fr; }
  .class-nav, .spec-grid { grid-template-columns: 1fr; }
  .catalog-groups { padding-left: 16px; padding-right: 16px; }
  .trust-strip div { border-right: 0; border-bottom: 1px solid #ddd5c8; }
  .section-head { align-items: start; flex-direction: column; }
  .quote-form { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; }
}